The libraries moved were:
- mzlib/control => racket/control
- mzlib/date => racket/date
- mzlib/deflate => file/gzip
- mzlib/inflate => file/gunzip
- mzlib/port => racket/port
- mzlib/process => racket/system
- mzlib/runtime-path => racket/runtime-path
- mzlib/shared => racket/shared
- mzlib/unit => racket/unit
- mzlib/unit-exptime => racket/unit-exptime
- mzlib/zip => file/zip
The old modules in mzlib are now pointers to the
new modules. These are all modules that were already
redirected in the documentation.
Added alises for call-with-continuation-prompt,
abort-current-continuation, and call-with-composable-continuation.
Also allow % and fcontrol to take an optional prompt tag argument.
